RF MEMS Integrated Frequency Reconfigurable Annular Slot Antenna

• NCJ Number: 249137
• Journal: IEEE Transactions on Antennas and Propagation Volume: 58 Issue: 3 Dated: March 2010 Pages: 626-632
• Author(s): B. A. Cetiner; G. R. Crusats; L. Jofre; N. Biyikli
• Date Published: March 2010
• Length: 7 pages
• Grant Number(s): 2007-IJ-CX-K025
• Agencies: NIJ-Sponsored
• Publication Type: Research (Applied/Empirical)
• Award: MEMS Integrated MRA for Use in Multi-functional MRA System

Annotation

This paper reports on the development and features of a frequency reconfigurable (flow=2.4 GHz and fhigh=5.2 GHz) annular slot antenna.

Abstract

The reconfigurability is achieved through single-arm and double-arm DC-contact microelectromechanical (MEMS) actuators, which are strategically located within the antenna geometry and the microstrip feed line. Simulations and measurements demonstrated that the antenna has similar gain (~ 2 dB) and well-behaved radiation patterns at both frequency bands, which is a required antenna feature for multi-mode, multi-band mobile wireless communication applications. The average value of S21 (~ -0.2 dB in the switch down-state) indicates that the switch contact resistance is ~ 2 omega. Also, the effect of SiCr bias circuitry on the radiation and impedance characteristics is negligible. 11 figures and 24 references